Real-Time Measurement and Control

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sbRio 9636 System Time

Hello 

 

After I set new System Time on Sbrio 9636, time is reseted when I reboot board. I See that there is a battery on board 3,3v probably to support track of real time ? But even though time is still reseting . So can anyone tell me what is for that battery ? And is it possible to keep track of system time ?

 

Thanks ! 

 

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Hi Calmstar,

What is your method to set the time ?
Can you check if the battery is still delivering 3.3 V if you have your sbRIO since a long time ?

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I tried two methods : 

1. Via web-server manually change time and save it. 

2. Programatically from PC.

set_time_sbrio.png

 

I bought a new 3,3v battery , but still didn't changed anything. 

 

What I found in datasheet is that there is a VBAT pin on RMC connector and that VBAT line is to power up real time clock to keep track of absolute time . So what is for that battery onboard ? 

 

 

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From the datasheet :

http://www.ni.com/pdf/manuals/373378c.pdf

 

The NI sbRIO device implements an onboard real-time clock (RTC) to keep track of absolute time. The RMC connector provides a VBAT line to power the RTC. Without a battery, absolute time will be reset during a power cycle.

 

At startup, the system clock of the NI sbRIO-9605/9606 resets to January 1, 1970, 12:00 a.m. (midnight), unless VBAT is implemented on the RMC.
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So the VBAT jumper activates the functionnality, and the battery brings the power.

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